Raman Spectroscopy Investigation of Camphor Soot: Spectral Analysis and Structural Information

Krishnan, Ramya; John, Jerin Susan; Balachandran, Manoj

doi:10.1016/s1452-3981(23)12981-6

Cited by 34 publications

(5 citation statements)

References 13 publications

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“…13) In addition, 2D peak appear at 2718 cm −1 whereas D3 peak originating from amorphous carbon does not appear at ~1500 cm −1 band. 13,16) From these observations, it is inferred that there exists graphitic substance in the deposited film. As this 2D peak is somewhat broad and lower in intensity compared with the G peak, it is deduced that the graphitic product has a multi-layer structure.…”

Section: Resultsmentioning

confidence: 99%

Catalyst-Free and Large-Area Deposition of Graphitic Carbon Films on Glass Substrates by Pyrolysis of Camphor

Nam¹,

Lee²

2015

Korean. J. Mater. Res.

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The feasibility of obtaining graphitic carbon films on targeted substrates without a catalyst and transfer step was explored through the pyrolysis of the botanical derivative camphor. In a horizontal quartz tube, camphor was subjected to a sequential process of evaporation and thermal decomposition; then, the decomposed product was deposited on a glass substrate. Analysis of the Raman spectra suggest that the deposited film is related to unintentionally doped graphitic carbon containing some sp-sp 2 linear carbon chains. The films were transparent in the visible range and electrically conductive, with a sheet resistance comparable to that of graphene. It was also demonstrated that graphitic films with similar properties can be reproduciblyobtained, while property control was readily achieved by varying the process temperature.

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Section: Resultsmentioning

confidence: 99%

Catalyst-Free and Large-Area Deposition of Graphitic Carbon Films on Glass Substrates by Pyrolysis of Camphor

Nam¹,

Lee²

2015

Korean. J. Mater. Res.

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“…The extent of disorder within the graphitic layers of ZMAC is assessed by the similarity in the position of a broad peak, as evidenced in the ZMAC spectra. This observation aligns with findings from prior studies on graphitic materials and supports this characterization . The TGA of the ZMAC sample is shown in Figure C, indicating a single stage of weight loss at various temperatures.…”

Section: Resultsmentioning

confidence: 99%

“…This observation aligns with findings from prior studies on graphitic materials and supports this characterization. 42 The TGA of the ZMAC sample is shown in Figure 1C, indicating a single stage of weight loss at various temperatures. The first was 30% at 350 °C, which may be related to the liberation of volatile organic chemicals.…”

Section: Identification Of Zmacmentioning

confidence: 99%

Effective Removal of Carcinogenic Azo Dye from Water Using Zea mays-Derived Mesoporous Activated Carbon

Mohamed,

El-Aassar,

Ibrahim

et al. 2024

ACS Omega

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Addressing industrial wastewater treatment challenges and removing hazardous organic pollutants, such as carcinogenic methyl orange (MO) and azo dyes, is a pressing concern. This study explores the use of the Zea mays envelope, an agricultural waste product, to produce Z. mays activated carbon (ZMAC) through the chemical activation of maize envelopes with phosphoric acid. Various analytical techniques, including FTIR, XRD, TGA, DSC, and SEM, characterize ZMAC. Results show that ZMAC exhibits an impressive monolayer adsorption capacity of 66.2 mg/g for MO. The Langmuir isotherm model fits the experimental data well, indicating monolayer coverage of the MO on the ZMAC surface. The pH-sensitive adsorption process demonstrates an optimal removal efficiency at pH 4. ZMAC follows the pseudo-second-order kinetic model, and diffusion rate constant analysis identifies three consecutive stages in the adsorption process. Moreover, the uptake of MO ions by ZMAC is identified as an exothermic and spontaneous process. Reusability tests demonstrate efficient regeneration of ZMAC up to five times with 1 mL of 2 M HNO 3 in each cycle, without sorbent mass loss. Thermodynamic analysis shows an increase in the uptake capacity from 66.2 to 73.2 mg/g with temperature elevation. This study offers practical solutions for industrial wastewater treatment challenges, providing an environmentally sustainable and effective approach to mitigate the risks associated with hazardous organic pollutants.

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“…Camphor on burning undergoes thermal decomposition to form soot. Atmospherically burned camphor soot contains the presence of carbon (93.29%), oxygen (3.19%), aluminium (0.63%), silicon (0.55%) and potassium (2.34%) (11). Three methyl's (CH3) and one carbonyl (C=O) groups make up camphor.…”

Section: Various Forms Of Carbon-based Nanomaterials (Cnms) Studiedmentioning

confidence: 99%

“…It is also reported that, for an ideal graphitic crystal, only a few vibrational modes are Raman active. When a structural disorder is present, some forbidden vibrational modes become Raman active (11). Carbon atoms at the edges of graphene layers are thought to be the most likely source of the D band in polycrystalline carbonaceous materials with a large number of tiny graphitic crystallites.…”

Section: Characterisation Techniquesmentioning

confidence: 99%

Structural Characteristics of Commercially Available and Self Synthesized Carbon Nanomaterials

2022

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The element carbon has been used as a source of energy for the past few hundred years, and now in this era of technology, carbon has played a significant and very prominent role in almost all fields of science and technology. The interesting characteristic of carbon is its ability to form many allotropes due to its valency. In recent decades, various allotropes and forms of carbon have been invented, including fullerenes, carbon nanotubes (CNTs), and graphene. So as an honor to this marvelous element, we humans should know about its various forms of existence. In this present work, we shed light on structural studies of commercially available and self-synthesized carbon nanoparticles. A brief introduction is given to the types, structures, and shapes of the allotropes of carbon for a better understanding. The crystallographic structure of the carbon nanomaterials (CNMs) is investigated by X-ray diffraction (XRD) peak profile analysis. The microstructure is characterized based on crystallite size, interplanar spacing, density, strain, and dislocation density. Raman spectroscopy is particularly well studied to characterize the molecular morphology of CNMs.

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Raman Spectroscopy Investigation of Camphor Soot: Spectral Analysis and Structural Information

Cited by 34 publications

References 13 publications

Catalyst-Free and Large-Area Deposition of Graphitic Carbon Films on Glass Substrates by Pyrolysis of Camphor

Catalyst-Free and Large-Area Deposition of Graphitic Carbon Films on Glass Substrates by Pyrolysis of Camphor

Effective Removal of Carcinogenic Azo Dye from Water Using Zea mays-Derived Mesoporous Activated Carbon

Structural Characteristics of Commercially Available and Self Synthesized Carbon Nanomaterials

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